Milking apparatus



sept. 1o, 1929. Q BUDAC'H 1,727,501

MILKING APPARATUS Filed April 20, 1927 Patented Sept. 10, 1929;-

UNITED STATESI PrENr joFFlca Application med .April 20, 1927, Serial No.

This invention relates to an improved milking apparatus of that known kind having a double-walled milking cup atvthe lower end of which a ulsator is so arranged that the milk lowst rough a lateral suction pipe di-4 r rectly from the teat chamber of theiapparatus into the milking pail that is under permanent reducedpressure. The essence of the invention consists in the rovison of a permanent narrow communication between the outerand inner chambers of the milking cup and in the fact that the air admission opening of the pulsator is controlled by one single spherical valve only, whereby the hitherto freqauentlyf'`- occurring disturbances in the working of such pulsators are electively avoided,

The accompanying drawing illustrates the improvedmilking apparatus: Fig. l is a vertical central section through the lower part of the same on the line A--B of Fig. 2., which is a cross-section on the line G-D of Fig. 1.

The apparatus comprises an outer cylindrical metal shell 'w with the elastic teat cup 'v inserted therein, said cup enclosing the teat chamber c and forming with the wall oi said metal shell the pressure varying chamber it, said chambers c and :t being in communication with one another through vertical channels g, an annular channel e, f, and a narrow boring'a?. ln the lower end of the teat cup o a conical bush is inserted, which carries the pulsator and bears at its upper end against a ange u provided in the teat cup o, said bush having a cylindrical cavity from the bottom of which the inclined lateral suction pipe a leads to the outside, the same being connected with the milking pail by means ot a rubber pipe (not shown).

The pulsator comprises an inner casing l forming avalve-chaniber g with a valve-seat in its false bottom and a spherical valve a therein facing a lower port m, while for loading said valve and safety guiding it a bronze ballois located with little play within said valve-chamber, the latter being in communication with the annular channel e, f through a vertical channel lc and a port e' provided inthe bush t. YThe casing l is rovided, at its lower part projecting beyon its false bottom, wlth openings p and at its bottom, that 185,271, and in eermanyaprn sa, 192s.

is loosely inserted therein, acted-upon by a pressure-screw s which tightens said bottom and screws into the outer casing 1' surrounding said inner casing and having air admission holes s in its walls.

The operation of the improved pulsator is as follows z-The suction pipe a is, as men tioned, 'connected with the milking pail, in which a vacuum conduit' produces a permanent reduced pressure, and the teat cupv is applied to the teat. With the valve '(1, being in closed position7 the vacuum produced by the milking action through the suction pipe a extends further from the chamber b to the tea't chamber c and through the narrow boring d and the annular channele, f andthe vertical channels g to the pressure varying chamber k, as well as through rthe channels c' and k to the valve chamber g, wlhereby equal pressure exists in the teat chamber c the pressure varying chamber h, and the va vec-chamber g, the elastic teat cup u assuming thus its .natural position.v The inferior pressure eX- isting in said chambers then lifts the valve n and outer air flows thereby through e, m, g,

it', e, f, g into the pressure varying chamber hwhile a small quantity thereof Y escapes through the narrow port d' into the chamber b whence it is at once sucked-od through the suction pipe a without materially inuencing the inferior pressure existing in the teatchamber c. At the same time, the air in thv.` pressure varying chamber 71. presses the elastic teat cup o upon the teat, said pressureacting, exactly like with hand milking, from above to down below as the wallrot the teat cup is thinner at its upper part than at its lower part. l

The milk dows thus; exactl as with hand milking, by a compression o the teat from the teat chamber c through the chamber b and the suction pipe a into the milking pail,

without passing into they valve-chamber of the pulsator. B vthe admission of. outer air,

the pressure di erence in the valve-chamber and in the pressure varying chamber withreference to the outer air is neutralized and by the weight of the bronze ball o the valve n is closed, so that the same proceeding bei ns'-afresh whereby the required uniformly pulsating action for the treatment of the teat f is attained.

a What I claim, is

The combination, with a, double-walled 5 milking cup comprising an inner suction teat chamber and an outer pressure varying chamber and a pulsator with a valve-chamber in communication with the outer air and with said outer chamber respectively, of a permanent narrow communication between said inner and outer chambers, and one single spherical valve in said valve-chamber controllin the air admission to said outer chamber an to said inner chamber.

In testimony whereof I' have hereunto set my hand.

GUSTAV BUDACH. 

